PENGEMBANGAN MEDIA PEMBELAJARAN PAPAN MONTESSORI DIGITAL PADA MATERI PENJUMLAHAN DAN PENGURANGAN BILANGAN CACAH UNTUK SISWA KELAS IV SEKOLAH DASAR

This research is motivated by students low understanding of mathematical concepts and the lack of technology-based learning media utilization in elementary schools. The objective of this study is to develop a Digital Montessori Board learning media on the topic of addition and subtraction of whole numbers for 4th-grade students that meets the criteria of validity, practicality, and effectiveness. This study employs the Research and Development (R&D) method using the ADDIE development model, which consists of Analysis, Design, Development, Implementation, and Evaluation stages. The field trial subjects consisted of 15 fourth-grade students and teachers at SD Negeri 83 Lubuk Linggau. Data collection was conducted using validation sheets, response questionnaires, and learning outcome tests (pretest-posttest). The results indicate that the developed media is highly valid based on the assessment of media experts, reaching the "very feasible" category, and material experts in the "very feasible" category. The practicality of the media is considered "very practical," with an average response percentage from teachers and students of 93%. Furthermore, the media proved to be sufficiently effective in improving student learning outcomes, as evidenced by an N-gain score of 0.74, which falls into the "high" category with an effectiveness level of 73.68%. Based on these results, the Digital Montessori Board media is suitable for supporting mathematics learning in elementary schools.